Grain-drill.



No. 709,74l. V y Patented sept. 23,' i902.

' G. H. BURRILL.

' GRAIN nmLL.

. 4 (Aww-ation mea Jung' 1a. 1902.) (No Model.)

" .I nml I 1 UNrrnn drenthe arent rrncnm GEORGE ll. BURRILL, OF ADAVILLE, IOVA.

GRIMM- DRlLl..

SPECIFICATIGN forming part of Letters Patent No. 709,741, dated September 23, 1902.

Application led .Tune 18, 1902. Serial No. 112,190. (No model.)

To all whom, t may oon/cern.-

Be it known that I, GEORGE H. BURRILL, a citizen of the United States, residing at Adaville, in the county of Plymouth and State of Iowa, have invented a new and useful Grain- Drill, of which the following is a specification.

This invention relates generally to graindrills, and more particularly to an improved means for supporting the colter in advance of the shoe arranged adjacent to the drilltube, the object of the invention being to provide a simple device by means of which theV colter is pressed down upon the face of the earth and will act independent of the drilltube and shoe in its downward movement.

Another object is to provide a construction whereby as the drill-tube and shoe are elevated the colter will also be lifted from the ground.

With these various objects in View the invention consists in the novel features of construction, combination, and arrangement, all of which will be fully described hereinafter and pointed out in the claims.

In the drawings forming part of this specification, Figure lis a perspective View showing the practical application of my invention. Fig. 2 is a plan view of. the same, the drilltube and shoe being omitted. Fig. Sisa detail sectional view, partly in elevation. Fig. 4 is a detail perspective View of the springrod for pressing the colter to the ground.

Referring to the drawings, A indicates a drill-tube, which is constructed and arranged substantially the same as drilltubes now in use, the lower end of said tube being arranged between the parallel supporting-beams B, which beams are pivotally connected at their forward ends to a rod C, forming a part of the drill-frame.

D indicates the ordinary shoe, which is arranged at the lower end of the drill-tube and in advance of the same, the forward end of said shoe being arranged between and connected tothe beams B.

The colter E is arranged between the beams B and in advance of the shoe D, said colter being circular Yin form and provided with a double cutting edge E, which serves to break the earth and cut through any weeds or other obstructions which might come in contact with the shoe. The colter E has an axle F rigidly connected therewith, said axle eX- tending a short distance from each side or face of the colter. The ends of the axle are journaled in the forked end of a bar G, the forward end of said bar being pivotally connected to the bar C between the beams B. A spring-rod H is arranged adjacent to the bar G, the rear end being hooked, as shown at H', and adapted to engage the said bar adjacent to its bifurcation. The rod H is passed under the bar C, then around the said bar, as shown at H2, and is provided with a transverse portion H3, which is arranged beneath the beams B, thereby exerting a downward pressure upon the ends H, thus serving to press the colter down into the ground. It is obvious from this construction that the colter will be normally held in contact with the ground, but will be permitted to spring upwardly whenever any obstacle is encountered. The colter is held independent of the shoe and drill-tube and serves to eut the ground, weeds, and the like prior to the contact of the shoe. l/Vhenever the drill-tube and shoe are lifted, the beams B are of course elevated, and the said beams engaging the axle of the colter serve to elevate the said colter simultaneous with the elevation of the tube and shoe.

A indicates the usualconstruetion of spring and bar employed for holding the tube projected downwardly and also lifting the shoe, and A2 indicates the usual form of drag-chain for covering the grain.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent, is-

l. The combination with the drill-tube,shoe and supporting-beams, of the colter arranged between the beams, the bifurcated bar carrying the colter, and a spring adapted to bear upon the said bar for the purpose of holding the colter in contact with the earth, as speciiied.

2. The combination with the drill-tube,shoe and beams, of a colter arranged between the beams, bifurcated bar carrying the colter, and the spring-rod, one end of which engages the said bar adjacent to its bifurcation, the

IOO

other end engaging the beams, said springl end and.n adapted to engage the said bifurlo rod normally holding the colter in Contact cated bar adjacent toits bifurcation, the opwith the earth, substantially as specified. i poste end being hooked or bent When brought 3. The combination with thed1il1-tube,shoe l into engagement With the under side of the and beams, of the colter arranged between beams for the purpose specified. the beams and having its axle adapted to en- GEORGE H. BURRILL. gage the said beams, a bar bifnrcated at one Witnesses: end and carrying a colter within said bifur- E. W. EDGINGTON, cated end, and a spring-rod hooked at one l XV. W. BURRILL. 

